✔ 最佳答案
你嘅朋友想學粵語還是國語(普通話)?
Anyway.
Does your friend speak English?
You can ask him/her to pick up some basic Cantonese/Mandarin at
http://Chinesebay.com to experience the language first
Chinesebay has page about learn Chinese in Hong Kong:
http://chinesebay.com/blog/learn-chinese-in-hong-kong/
( It does introduce CantonesePod where you can download short lessons to learn Cantonese with mp3 or podcasts, but forgot to mention
http://ChinesePod.com for Mandarin learning.)
also has Chinese chat rooms where people are friendly and helpful to get him/her started with Chinese learning.